error when save a file as .wav format

[ULIHZ]

I was trying to save some sound pressure data into .wav file.  I have a single wavform channel looks like this:

Once saved as .wav file, the data becomes:

What did I do wrong?

[ULIHZ]

I do have the audio data plugin installed, but I do not know how to use it.  The save as give me the same results before and after the installation. 

[StefanR]

The *.wav file specification says that the DBL data type may only be used if all the channel values are between -1 and +1.  That channel exceeds these limits slightly, therefore an integer data type is used.

You can simply rescale the channel prior to saving-- either smaller in amplitude to use the DBL data type or larger in amplitude to use the full range of an Int16 or an Int32.

[ULIHZ]

Thanks!  I scaled the data up to use the 32 bites integer.  It worked!